Motorcycle rear fender structure

ABSTRACT

There is provided a motorcycle rear fender structure provided at a rear part of a motorcycle. A fender stay extends to an upper rear side from one side of left and right rear swing arms rotatably supporting a rear wheel. A rear fender main body covers an upper rear side of the rear wheel. A bulging portion bulges outward and rearward from the rear fender main body integrally. A wiring chamber is formed in the bulging portion. A partition wall is supported by the fender stay and provided in the rear fender main body. The partition wall is provided with a wiring hole for introducing an electrical wire connected to a lighting device into the wiring chamber. The fender stay is provided with a lower protruding portion extending in a left-right direction at a lower side of the wiring hole in the rear fender main body.

CROSS-REFERENCE TO RELATED APPLICATIONS

The disclosure of Japanese Patent Application No. 2018-169786 filed onSep. 11, 2018, including specification, drawings and claims isincorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to a motorcycle rear fender structure.

BACKGROUND

In a motorcycle, a rear fender is configured into two parts by a firstfender having a hang portion formed to cover a rear side and an upperside of a rear wheel, and a second fender covering the upper side of therear wheel, such that the second fender suppresses rainwater or the likefrom entering into the license plate light and to the harness asdescribed in Patent Document 1, for example.

Patent Document 1: Japanese Patent Application Publication No.2014-061867 A

However, in the rear fender structure as described in Patent Document 1,it is necessary to separately provide a dedicated part (the secondfender) in order to prevent water from being applied to the electricalwiring and the mounting part of a lighting device. Therefore, there is aproblem that the manufacturing cost increases due to the increase in thenumber of parts and the number of assembling steps.

SUMMARY

It is at least one of objects of the present disclosure to provide amotorcycle rear fender structure capable of preventing muddy water,rainwater or the like scattered by a centrifugal force of a rear wheelfrom entering a wiring chamber without increasing the manufacturingcost.

According to an aspect of the embodiments of the present disclosure,there is provided a rear fender structure provided at a rear part of amotorcycle, including: a fender stay extending to an upper rear sidefrom one side of left and right rear swing arms rotatably supporting arear wheel of the motorcycle; a rear fender main body that covers anupper rear side of the rear wheel; a bulging portion that bulges outwardand rearward from the rear fender main body integrally, the bulgingportion in which a wiring chamber is formed; and a partition wallsupported by the fender stay and provided in the rear fender main body,wherein the partition wall is provided with a wiring hole forintroducing an electrical wire connected to a lighting device into thewiring chamber, and the fender stay is provided with a lower protrudingportion extending in a left-right direction at a lower side of thewiring hole in the rear fender main body.

With the above configuration, it is possible to prevent muddy water,rainwater or the like scattered by a centrifugal force of a rear wheelfrom entering a wiring chamber without increasing the manufacturingcost.

BRIEF DESCRIPTION OF THE DRAWINGS

In the accompanying drawings:

FIG. 1 is a left side view showing a rear part of a motorcycle providedwith a rear fender structure according to an embodiment of the presentdisclosure;

FIG. 2 is a perspective view showing the rear fender structure accordingto the embodiment of the present disclosure from a rear left side;

FIG. 3 is a perspective view showing the rear fender structure accordingto the embodiment of the present disclosure from a rear left side;

FIG. 4 is a perspective view showing a fender stay and a partition wallof the rear fender structure according to the embodiment of the presentdisclosure;

FIG. 5 is a sectional view taken along a line A-A in FIG. 3;

FIG. 6 is a sectional view taken along a line B-B in FIG. 5; and

FIG. 7 is a perspective view showing the rear fender structure accordingto the embodiment of the present disclosure from a rear side.

DETAILED DESCRIPTION OF THE EMBODIMENTS

A motorcycle rear fender structure according to an embodiment of thepresent disclosure includes a fender stay extending to an upper rearside from one side of left and right rear swing arms rotatablysupporting a rear wheel of the motorcycle; a rear fender main body thatcovers an upper rear side of the rear wheel; a bulging portion thatbulges outward and rearward from the rear fender main body integrally,the bulging portion in which a wiring chamber is formed; and a partitionwall supported by the fender stay and provided in the rear fender mainbody, wherein the partition wall is provided with a wiring hole forintroducing an electrical wire connected to a lighting device into thewiring chamber, and the fender stay is provided with a lower protrudingportion extending in a left-right direction at a lower side of thewiring hole in the rear fender main body.

According to the motorcycle rear fender structure of the embodiment ofthe present disclosure, it is possible to prevent muddy water, rainwateror the like scattered by a centrifugal force of a rear wheel fromentering a wiring chamber without increasing the manufacturing cost.

Embodiment

FIG. 1 is a left side view showing a rear part of the motorcycleprovided with a rear fender structure according to an embodiment of thepresent disclosure; FIG. 2 is a perspective view showing the rear fenderstructure according to the embodiment of the present disclosure from arear left side; FIG. 3 is a perspective view showing the rear fenderstructure according to the embodiment of the present disclosure from arear left side; FIG. 4 is a perspective view showing a fender stay and apartition wall of the rear fender structure according to the embodimentof the present disclosure; FIG. 5 is a sectional view taken along a lineA-A in FIG. 3; FIG. 6 is a sectional view taken along a line B-B in FIG.5; and FIG. 7 is a perspective view showing the rear fender structureaccording to the embodiment of the present disclosure from a rear side.When referring to directions in the description of the embodiment of thepresent disclosure, a driver of the motorcycle is used as a reference.

First, with reference to FIGS. 1 to 3, a schematic configuration of therear part of a motorcycle 1 provided with a rear fender structure 10according to the embodiment of the present disclosure will be described.

A pair of left and right rear swing arms 2L, 2R are coupled so as to beswingable in an upper-lower direction at the rear part of the motorcycle1. As shown in FIG. 1, a rear wheel 3 which is a driving wheel isrotatably supported at a rear part of the rear swing arms 2L, 2R. Adriven sprocket 4 is provided on a left side of an axle of the rearwheel 3 so that power of an engine (not shown) is transmitted to therear wheel 3 by a chain (not shown) wound around the driven sprocket 4.The chain is covered by a chain cover 5 and a brake disc (not shown) forthe rear wheel 3 is provided on a right side of the rear wheel 3. Arider seat 71 is disposed on an upper side of the rear wheel 3.

A pair of left and right arm members 6L, 6R are formed toward an upperfront direction from respective rear end portions of the pair of leftand right rear swing arms 2L, 2R. As shown in FIG. 3, two hose clamps 7are attached to an upper surface of the right arm member 6R in front andback, and a rear brake hose 9 is fixed along an upper surface of theright arm member 3R by the hose clamps 7.

Next, with reference to FIGS. 1 to 7, the rear fender structure 10according to the embodiment of the present disclosure will be described.

The rear fender structure 10 according to the embodiment of the presentdisclosure includes a fender stay 11 extending to an upper rear sidefrom the arm member 6L of the left rear swing arm 2L on which the chainis arranged, a partition wall 12 supported on an upper end portion ofthe fender stay 11, a rear fender main body 13 covering the upper rearside of the rear wheel 3, and a bulging portion 14 bulging outward andrearward from the rear fender main body 13 integrally.

As shown in FIG. 2 and FIG. 4, the fender stay 11 is provided withelongated cylindrical upper and lower stay pipes 15, 16. Supportingportions 17, 18 are respectively provided at lower end portions of theupper and lower stay pipes 15, 16. The upper stay pipe 15 extends towardthe upper rear side in an inclined manner with the supporting portion 17being fixed by a bolt 19 to an intermediate portion of the left armmember 6L. The lower stay pipe 16 extends toward the upper rear side inan inclined manner with the supporting portion 18 being fixed by a bolt20 to a lower portion of the left arm member 6L. The inclination of theupper stay pipe 15 is smaller than the inclination of the lower staypipe 16, and a distance between the upper and lower stay pipes 15, 16 isformed to be narrower toward the upper rear side.

As shown in FIG. 4, a first coupling plate 21 and a second couplingplate 22 for connecting both stay pipes 15, 16 are interposed betweenthe upper and lower stay pipes 15, 16 at an upper end side and a lowerend side, respectively. Round holes 23, 24 and 25 are formed at thecenter of the first coupling plate 21 and at the center of and an upperpart of the second coupling plate 22, respectively. A protruding piece26 protruding upward is attached to the intermediate portion of thelower stay pipe 16, and a round hole 27 is formed in the protrudingpiece 26. Further, a protruding piece 28 protruding downward is attachedto an upper end side of the lower stay pipe 16, and a round hole 29 isformed in the protruding piece 28.

The upper and lower stay pipes 15, 16, the first and second couplingplates 21, 22, and the protruding pieces 26, 27 are covered by anexterior cover 30. The round hole 23 at the center of the first couplingplate 21, the round hole 24 at the center of the second coupling plate22, and the round holes 27, 29 of the respective protruding pieces 26,28 are used to fix the exterior cover 30. Further, the round hole 25 onthe upper part of the second coupling plate 22 is used to support theelectrical wire 31 for the lighting device, which is wired along theupper stay pipe 15 in the exterior cover 30.

An upper protruding portion 32 and a lower protruding portion 33 eachhaving an elongated cylindrical shape are respectively provided on upperend portions of the upper and lower stay pipes 15, 16. The upperprotruding portion 32 and the lower protruding portion 33 are parallelto each other and formed to extend in a left-right direction.

As shown in FIG. 4, the partition wall 12 has a longitudinally longbracket plate 34 bent along the rear wheel 3, and left and right foldedportions 35 that are bent from left and right edges of the bracket plate34 to the rear wheel 3 side (lower front side). A first wiring hole 36is formed slightly above the center of the bracket plate 34. The firstwiring hole 36 has an elongated circular shape which is long in theleft-right direction.

An upper fixing portion 37 and a lower fixing portion 38 are formed onthe upper and lower sides of the first wiring hole 36 in the bracketplate 34, respectively. The fixing portions 37, 38 have openings 39, 40and upper and lower fixing pieces 41, 42 formed to be bent from upperand lower edges of the openings 39, 40 toward the rear wheel 3 side,respectively. An upper cutout portion 43 and a lower cutout portion 44are formed in the left and right folded portions 35 at positionscorresponding to the upper fixing portion 37 and the lower fixingportion 38, respectively.

The upper protruding portion 32 is welded to the upper and lower fixingpieces 41 of the upper fixing portion 37 and the upper cutout portions43 on the left and right; and the lower protruding portion 33 is weldedto the upper and lower fixing pieces 42 of the lower fixing portion 38and the lower cutout portions 44 on the left and right. Therefore, thepartition wall 12 is fixed to the upper end portion of the fender stay11. At this time, as shown in FIG. 5, the lower protruding portion 33 isattached so as to protrude to a center side of the rear wheel 3 withrespect to a tangent line t to the rear wheel 3 passing through an upperedge 36 a of the first wiring hole 36.

On a rear wheel 3 side surface (inner surface) of the bracket plate 34,first fixing nuts 45 are welded to two positions at left and rightcorners on the upper end side, second fixing nuts 46 are welded to twopositions on the a lower side of the lower fixing portion 36, and thirdfixing nuts 47 are welded to two positions at left and right corners onthe lower end side. Further, in order to reduce the weight, throughholes 48 are opened at a plurality of positions (six in the illustratedexample) of the bracket plate 34.

The rear fender main body 13 is formed by injection molding of resin. Asshown in FIG. 5, the rear fender main body 13 includes an upper portion51 where an opening part 50 is formed, and a lower portion 53 to which alicense plate 52 is attached at the rear side. First fixing portions 54are formed at positions corresponding to the first fixing nuts 45 in anupper part of the upper portion 51, second fixing portions 55 thickerthan other parts of the lower portion 53 are formed at positionscorresponding to the second fixing nuts 46 in an upper part of the lowerportion 53, and third fixing portions 56 are formed at positionscorresponding to the third fixing nuts 47 of the lower portion 52.

A first bolt to a third bolt 57 are respectively screwed to the firstfixing nuts 45, the second fixing nuts 46 and the third fixing nuts 47via the first fixing portions 54, the second fixing portions 55 and thethird fixing portions 56 from an outer surface side (rear side) of therear fender main body 13, so that the rear fender main body 13 is fixedto the partition wall 12. Thus, the opening part 50 of the upper portion51 is closed by the partition wall 12 attached to an inner side of therear fender main body 13. At this time, since the second fixing portion54 is formed thick as described above, a gap is formed between thepartition wall 12 and the lower portion 52 of the rear fender main body13. Due to the gap, a drain passage 56 is formed downward along asurface where the partition wall 12 overlaps with an inner surface ofthe rear fender main body 13.

The bulging portion 14 is formed in a box shape so as to bulge outwardand rearward from left and right edges and a lower edge of the openingpart 50 of the rear fender main body 13. Left and right side walls 61and a rear side wall 62 of the bulging portion 14 are integrally formedwith the rear fender main body 13, and a wiring chamber 60 is formedtherein. In upper portions of the left and right side walls 61 of thebulging portion 14, wiring holes 63 for direction indicator as secondwiring holes are formed. In an upper portion of the rear side wall 62 ofthe bulging portion 14, a wiring hole 64 for license plate lamp as asecond wiring hole is formed. The wiring hole 63 for directionindicators and the wiring hole 64 for license plate lamp are formed atpositions higher than the first wiring hole 36.

An upper wall of the bulging portion 14 is formed by a removable lidmember 65. The lid member 65 has left and right side wall portions 66and a rear wall portion 67, the left and right side wall portions 66 areformed to cover the wiring holes 63 for direction indicator from theoutside, and the rear wall portion 67 is formed to cover the wiring hole64 for license plate lamp from the outside. Left and right directionindicators 68 are attached to the left and right side wall portions 66of the lid member 65, respectively. A license plate lamp 69 is disposedin a space between the rear side wall 62 of the bulging portion 14 andthe rear wall portion 67 of the lid member 65, and the license platelamp 69 is attached to the rear side wall 62 of the bulging portion 14.Further, a first bolt 49 is screwed to the first fixing nut 45 via thefirst fixing portion 54, so that a front end portion of the lid member65 is fastened together with the rear fender main body 13 to thepartition wall 12 at two positions, and the left and right side wallportions 66 of the lid member 65 are fixed to the left and right sidewalls 61 of the bulging portion 14 with screws 70 (refer to FIG. 7)respectively.

After passing through the first wiring holes 36 as shown in FIG. 5 andFIG. 6, the electrical wire 31 for the lighting device which is wiredalong the upper stay pipe 15 as shown in FIG. 2 is connected to the leftand right direction indicators 68 through the left and right wiringholes 63 for direction indicator, and is connected to the license platelamp 69 through the wiring hole for license plate lamp 64 as shown inFIGS. 5 to 7.

According to the rear fender structure for the motorcycle 1 of theembodiment of the present disclosure as described above, as indicated bythe arrows in FIG. 5, muddy water, rainwater or the like that is broughtup by the rear wheel 3 while the motorcycle 1 is traveling and scatteredin a tangential direction from an outer periphery of the rear wheel 3can be blocked by the lower protruding portion 33 provided on the fenderstay. Further, muddy water, rainwater or the like on an upper part ofthe rear fender main body 13 can be blocked by the upper protrudingportion 32 provided on the fender stay. Therefore, muddy water,rainwater or the like can be prevented from entering into the wiringchamber 60 through the first wiring hole 36 without increasing themanufacturing cost.

Further, the lower protruding portion 33 is provided so as to protrudeto a center side of the rear wheel 3 with respect to a tangent line t(see FIG. 5) to the rear wheel 3 passing through an upper edge 36 a ofthe first wiring hole 36, so that the muddy water, rainwater or the likecoming from the rear wheel 3 can be reliably blocked from enteringdirectly into the first wiring hole 36.

According to the rear fender structure 10 for the motorcycle 1 of theembodiment of the present disclosure as described above, the upperprotruding portion 32 and the lower protruding portion 33 are used forthe upper and lower stay pipes 15, 16 as well, so that there is no needto add a dedicated member, and the cost reduction effect can beexpected.

The present disclosure can be appropriately changed within a scope notcontrary to the gist or idea of the present disclosure which can be readfrom the entire claims and the specification, and a rear fenderstructure with such a change is also included in the technical conceptof the present disclosure.

What is claimed is:
 1. A motorcycle rear fender structure provided at arear part of a motorcycle, the motorcycle rear fender structurecomprising: a fender stay extending to an upper rear side from one sideof left and right rear swing arms rotatably supporting a rear wheel ofthe motorcycle; a rear fender main body that covers an upper rear sideof the rear wheel; a bulging portion that bulges outward and rearwardfrom the rear fender main body integrally, the bulging portion in whicha wiring chamber is formed; and a partition wall supported by the fenderstay and provided in the rear fender main body, wherein the partitionwall is provided with a wiring hole for introducing an electrical wireconnected to a lighting device into the wiring chamber, and the fenderstay is provided with a lower protruding portion extending in aleft-right direction at a lower side of the wiring hole in the rearfender main body.
 2. The motorcycle rear fender structure according toclaim 1, wherein the fender stay is provided with an upper protrudingportion extending in the left-right direction at an upper side of thewiring hole in the rear fender main body, the fender stay is comprisedof upper and lower stay pipes, and the upper protruding portion and thelower protruding portion are respectively configured by the upper andlower stay pipes.
 3. The motorcycle rear fender structure according toclaim 1, wherein the lower protruding portion is provided so as toprotrude to a center side of the rear wheel with respect to a tangentline to the rear wheel passing through an upper edge of the wiring hole.